senator feinstein says the issue is also very personal for her. remember, she became mayor of san francisco in 1978 after a gunman shot and killed the mayor at city hall. >> once you have been through one of these episodes, once yous like, it isn't like the movies. it changes your view of weapons, i think. >> shepard: the assault weapons ban expired almost a decade ago and tonight a spokesman for the nra says there is no need to renew it because gun bans do not work. >>> shannon bream live in d.c what would this new bill do exactly. >> it would ban the sale, manufacture, transfer and importation of 157 specific guns, along with a broader group of other guns that would meet a new lower threshold for classifying a firearm as an assault weapon. there would be numerous bans on various high capacity magazines and beefed up background checks on the sale and transfer of all assault weapons. vice president joe biden said today assault weapons aren't necessary for personal protection. >> the shotgun will keep you a lot safer. a double barrel shotgun than t